condition mean min max ZT0-3 602.28986 602.28986 602.28986 ZT4-7 829.0962685 829.0962685 829.0962685 ZT8-11 1142.87636 1142.87636 1142.87636 ZT12-15 937.7169185 937.7169185 937.7169185 ZT16-19 779.7650535 779.7650535 779.7650535 ZT20-23 731.582318 731.582318 731.582318